20019831

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{571}}^1$

素因数の和:647

約数の個数: 32

約数和(自身を含む): 30750720

約数和(自身を除く): 10730889

約数列:

[1, 3, 13, 29, 31, 39, 87, 93, 377, 403, 571, 899, 1131, 1209, 1713, 2697, 7423, 11687, 16559, 17701, 22269, 35061, 49677, 53103, 215267, 230113, 513329, 645801, 690339, 1539987, 6673277, 20019831]

約数ペア:

[(1, 20019831), (3, 6673277), (13, 1539987), (29, 690339), (31, 645801), (39, 513329), (87, 230113), (93, 215267), (377, 53103), (403, 49677), (571, 35061), (899, 22269), (1131, 17701), (1209, 16559), (1713, 11687), (2697, 7423)]